'American Idol' Spoiler -- Another One Bites the Dust
"American Idol" finalists performed songs written from the current century, in an episode themed "21st Century Night."
Teaming up to sing Train's hit song "Hey Soul Sister" were Jacob Lusk, Stefano Langone, Lauren Alaina and Haley Reinhart. Following their performance were Casey Abrams, Scotty McCreery and James Durbin, who sang "Viva la Vida."
In a flickering bodysuit, Katy Perry walked on stage and performed "E.T." with a surprise guest appearance from Kanye West. Season 7 "Idol" winner David Cook returned to the stage and sang his new single, "The Last Goodbye."